I couldn't find a YouTube video unfortunately.
But I did fit mine today. It was quite a tight fit so I used a thin flat wooden spatula from the kitchen and slid that between the bumper and headlight unit and gently prised them apart which allowed me to get the protector nicely in place. It was still pretty tight to get in but the assistance from the kitchen utensil made it that little bit easier and prevented me having to use too much force. What I did notice was that when I was giving the headlights a good clean prior to fitting the protectors was that they are peppered with lots of little stone chips! I'll not be fitting the beam deflectors until September when I'm off to Europe. Any more luck with yours OP?